Answer / ashish sahebrao tekade

If there is a low pressure the arc quenching time of current is low, thats why relay got large time to operate. If there is high pressure of sf6 gas there is a possibility to break a bottle of sf6 gas filled which is harmful of machinery

Answer / k.prakashchandra

And the contacts may get damaged due to prolonged arcing

Why battery rooms painted with dark colour

1 Answers   BAL, MSETCL Maharashtra State Electricity Transmission Co Ltd, Polycab,

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In case of salient pole alternator when number of poles are 4 or more than 4 it helps the flux wave to be sinusoid as air gap length is increased from center to tip , but if the number of poles are 2 how does the flux wave is sinusoidal?

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what is gapless metal oxide techniques?

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How will calculate losses in an multi core Aluminium LT cable of different sizes & upto what length we can use a LT Cable ?

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What is the use of Exciter in generator? & what will be the current of Exciter in 500 KVA DG Set?

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method to check earthing

5 Answers   ECC,

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how we can calculate cable size for any load & any type of cable material ?

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1.what is difference in maintain Hz again Hz in USA ? 2.how to calculate the battery AH? 3.why are yearly maintained in transformer how many tests in required?

0 Answers   Areva, Google,

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if dc excitation is used to produce manetic flux in rotating machines then ehy it is not used in transformers.

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Hi How can you start-up the 40w tube lite with 230v AC/DC without using any choke/Coil.

5 Answers  

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what is the function of closing coil in air circuit breaker?

0 Answers   Fresher,

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what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

0 Answers   Conan Minerals,

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